Location of the lowest even parity excited singlet state in poly(p-phenylenevinylene) by two-photon fluorescence spectroscopy

Autor:	D.D.C. Bradley, C.J. Baker, O.M. Gelsen
Rok vydání:	1993
Předmět:	Computer Science::Systems and Control Chemistry Excited state General Physics and Astronomy Parity (physics) Singlet state Physical and Theoretical Chemistry Atomic physics Spectroscopy Fluorescence Excited singlet Excitation Parity bit
Zdroj:	Chemical Physics Letters. 201:127-131
ISSN:	0009-2614
DOI:	10.1016/0009-2614(93)85045-p
Popis:	We report the two-photon fluorescence excitation spectrum of poly( p -phenylenevinylene) over the energy range 1.1–2.0 eV. The onset for two-photon fluorescence excitation is at 1.3 eV with a strong peak near 1.475 eV. The peak locates the energy of the lowest even parity excited singlet at 2.95 eV, some 0.5 eV above the lowest dipole-allowed singlet transition (the fundamental ππ* absorption). This energetic ordering of excited states is in agreement with the predictions of theory and is consistent with the strong one-photon fluorescence seen for this polymer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::536a2210165f72940c5da97268faf4b3 https://doi.org/10.1016/0009-2614(93)85045-p Zobrazit plný text záznamu